r/Shed

Hey team, in the progress of framing up 10x8 garden shed. I’m concerned about the capacity of my piers/foundation. Here is some data:

-Western Washington
-shed on a slope so sonotubes used to establish flat platform
-(4) 10” diameter sonotubes varying depth. Front tubes around 18” into soil
-hand tamped the sh*t out of the native soil prior to pouring. Seemed to compact well

As I’m getting to framing I’m just growing concerned this thing is going to sink. I chatgptd this foundation design along the way and got the thumbs up a few months ago. I resubmitted my design to AI again and it was a little less sure of itself.

Any thoughts? Thanks!!!!!🙏🏻

The ground here gets rather wet, if not fully saturated. Where should a vapor barrier go? Currently Mt father wants to put it ontop of the framing to put foam board insulstion ontop of prior to subfloor, as a way to secure them. My monkey brain says thats a bad idea. What should we do instead?

Been at this for about two yrs trying different layouts im happy with how it looks and feels now it not a big one so i have to make space count plus it's been good to get in the shed today